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A164776
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Numbers n with property that average digit of n^2 is s=4.
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10
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2, 41, 58, 59, 68, 85, 95, 1027, 1034, 1036, 1072, 1081, 1088, 1108, 1124, 1135, 1144, 1153, 1169, 1232, 1234, 1243, 1252, 1259, 1268, 1277, 1279, 1295, 1297, 1306, 1315, 1331, 1340, 1342, 1349, 1358, 1360, 1369, 1385, 1394, 1405, 1423, 1441, 1448, 1457
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listen;
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internal format)
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OFFSET
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1,1
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LINKS
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EXAMPLE
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41^2 = 1681 and (1 + 6 + 8 + 1)/4 = 4
58^2 = 3364 and (3 + 3 + 6 + 4)/4 = 4.
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PROG
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(PARI) dsum(n)={my(s=0); while(n>9, s+=n%10; n\=10); s+n};
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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STATUS
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approved
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